这个算法去年的这个时候就已经听过了,看毛片算法哈哈..不过理解它确实花了我很久的时间..以致于我一直很排斥字符串的学习,因为总觉得太难了,但是有些硬骨头还是要啃的,这个寒假就啃啃字符串还有一些别的东西吧,KMP的学习我看了好多好多博客才有那么些头绪,复杂度的分析更是无从谈起,不过线性匹配这样的算法实在太流弊了.~题目是水题,但也算是我的第一道KMP吧.~ #include<iostream> #include<cstring> #include<string> #inc…

Oulipo Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 23667   Accepted: 9492 Description The French author Georges Perec (1936–1982) once wrote a book, La disparition, without the letter 'e'. He was a member of the Oulipo group. A quote…

本题就是给出非常多对字符串,然后问一个字符串在另外一个字符串出现的次数. 就是所谓的Strstr函数啦. Leetcode有这道差点儿一模一样的题目. 使用KMP算法加速.算法高手必会的算法了. 另外看见讨论说什么使用KMP还超时,最大可能是没有真正理解next table的含义,写了错误的代码,故此尽管自己执行结果正确,可是却没有真正发挥next table的作用.使得算法退化为暴力法了,所以执行正确,但超时. KMP參考: http://blog.csdn.net/kenden23/arti…

Oulipo Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 17795   Accepted: 7160 Description The French author Georges Perec (1936–1982) once wrote a book, La disparition, without the letter 'e'. He was a member of the Oulipo group. A quote…

题目地址:http://acm.hdu.edu.cn/showproblem.php?pid=1686 题目: Problem Description The French author Georges Perec (1936–1982) once wrote a book, La disparition, without the letter 'e'. He was a member of the Oulipo group. A quote from the book: Tout avait…

题意: 给两组字符串a和b,求a在b中出现的次数 关于KMP: 马拉车算法是处理回文串,而KMP是处理前后缀的相同字符串的最长长度. a | a | b | a | a | f | a | a 数组 p [ ] 下标为 i a | a | b | a | a | c 数组 t [ ]下标为 j -1| 0 | 1 | 0 | 1 | 2 next [ ] shu数组的值 比较这两组字符串,当p[5]!=t[5]时,如果暴力,那么 i 回溯到1,j 回溯到0,重新比较,可是在之前比较过的0~4下标…

题目大意 给定一个文本串和模式串,求模式串在文本串中出现的次数 题解 正宗KMP 代码: #include<iostream> #include<cstring> #include<string> #include<cstdio> using namespace std; #define MAXN 10005 ],P[MAXN]; int f[MAXN]; void getFail() { int m=strlen(P); f[]=f[]=; ; i<…

# include <stdio.h> # include <algorithm> # include <string.h> using namespace std; char a1[1000010],a2[1000010]; int next[1000010]; int len1,len2,cot; void Getnext() { int i=0,j=-1; next[0]=-1; while(i<=len1) { if(j==-1||a1[i]==a1[j]…

题目链接:http://poj.org/problem?id=3461 代码如下: #include<cstdio>//poj 3461 kmp #include<cstring> using namespace std; char s1[1000005], s2[10005]; int len1, len2,next[10005]; void getnext() { //next数组其实是:当前字符匹配失败时,小字符串退回到合适的位置,然后继续匹配. int i = 0, j =…

Problem Description The French author Georges Perec (1936–1982) once wrote a book, La disparition, without the letter 'e'. He was a member of the Oulipo group. A quote from the book: Tout avait Pair normal, mais tout s’affirmait faux. Tout avait Fair…